A steel belt type multi-stage dry separation device

Abstract

The present invention discloses a steel belt type multi-stage dry separation device, comprising a box body, a feed port and a discharge port arranged on the box body, and a conveying assembly arranged in the box body, wherein the conveying assembly comprises a first conveying assembly, a second conveying assembly, and a third conveying assembly arranged in sequence from top to bottom, the conveying directions of the first conveying assembly and the third conveying assembly are the same and opposite to the conveying direction of the second conveying assembly, and a magnetic system is arranged in the first conveying assembly and the third conveying assembly. The steel belt type multi-stage dry separation device of the present invention forms a multi-stage magnetic system frame through the cooperation of the first conveying assembly, the second conveying assembly, and the third conveying assembly, which can perform multi-stage thorough separation of ore, has a good separation effect, and greatly improves the resource utilization rate.

Description

Technical Field

[0001] The invention relates to the field of ore sorting, and in particular to a steel belt type multi-stage dry sorting device. Background Art

[0002] Ore dressing is the process of crushing and grinding the ore according to the physical and chemical properties of different minerals in the ore, and then using gravity separation, flotation, magnetic separation, electrostatic separation, etc. to separate useful minerals from gangue minerals, and to separate various symbiotic (associated) useful minerals from each other as much as possible, remove or reduce harmful impurities, so as to obtain the raw materials needed for smelting or other industries.

[0003] At present, dry magnetic separation is usually used for iron ore selection. However, the existing dry separation equipment can only perform preliminary single-stage separation of magnetic minerals and non-magnetic minerals, and the separation is extremely incomplete. For minerals mixed together due to magnetic agglomeration and magnetic encapsulation, or weak magnetic minerals that are difficult to be adsorbed and encapsulated in non-magnetic minerals, the separation effect is poor, resulting in some magnetic minerals being directly discarded along with non-magnetic minerals, which is a great waste of resources. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art in that the sorting effect is relatively poor, and to provide a steel belt type multi-stage dry sorting device which can sort the ore thoroughly and has good sorting effect.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A steel belt type multi-stage dry sorting device comprises a box body, a feed port and a discharge port arranged on the box body, and a conveying assembly arranged in the box body, wherein the conveying assembly comprises a first conveying assembly, a second conveying assembly and a third conveying assembly which are arranged in sequence from top to bottom, the conveying directions of the first conveying assembly and the third conveying assembly are the same and opposite to the conveying direction of the second conveying assembly, a magnetic system is arranged in both the first conveying assembly and the third conveying assembly, the discharge port comprises a first discharge port for outputting magnetic minerals, a second discharge port and a third discharge port for outputting non-magnetic minerals which are arranged in sequence along the conveying direction of the first conveying assembly, two ends of the first conveying assembly are respectively located above the first discharge port and the third discharge port, two ends of the second conveying assembly are respectively located above the second discharge port and the third discharge port, and two ends of the third conveying assembly are respectively located above the first discharge port and the second discharge port.

[0007] Preferably, the first conveying assembly includes two rotatably arranged first conveying rollers and a first conveying belt drivingly connected to the two first conveying rollers, and the first conveying belt is a non-magnetic steel belt.

[0008] Further preferably, the magnetic system in the first conveying component includes permanent magnets respectively arranged in the first conveying roller at the end of the first conveying component in the conveying direction and at the top of the inner side of the first conveying belt, and an electro-permanent magnet arranged at the bottom of the inner side of the first conveying belt.

[0009] Further preferably, the rotation axis of the first conveying roller extends in a horizontal direction and is perpendicular to a conveying direction of the first conveying assembly.

[0010] More preferably, the second conveying assembly includes two rotatable second conveying rollers and a second conveyor belt drivingly connected to the two second conveying rollers.

[0011] More preferably, the rotation direction of the second conveying roller is opposite to the rotation direction of the first conveying roller.

[0012] More preferably, the third conveying component is a rotatably arranged third conveying roller, and the magnetic system in the third conveying component is a permanent magnet arranged in the third conveying roller.

[0013] More preferably, the rotation direction of the third conveying roller is the same as the rotation direction of the first conveying roller.

[0014] More preferably, the rotation axes of the second conveying roller and the third conveying roller are respectively arranged parallel to the rotation axis of the first conveying roller.

[0015] Preferably, the dry selection device further comprises two baffle plates which are arranged in the box body and are respectively located on the side of the first discharge port and the third discharge port which are away from each other, and the two baffle plates are arranged to be inclined downward in a direction approaching each other.

[0016] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: a steel belt type multi-stage dry sorting device of the present invention, through the cooperation of the first conveying assembly, the second conveying assembly and the third conveying assembly, forms a multi-stage magnetic system frame, which can perform multi-stage thorough sorting of ore, has good sorting effect, and greatly improves resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention.

[0018] Among them: 1. Box body; 2. Feed inlet; 3. Discharge outlet; 31. First discharge outlet; 32. Second discharge outlet; 33. Third discharge outlet; 4. First conveying assembly; 41. First conveying roller; 42. First conveyor belt; 5. Second conveying assembly; 51. Second conveying roller; 52. Second conveyor belt; 6. Third conveying assembly; 61. Third conveying roller; 7. Magnetic system; 8. Baffle plate. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0020] The present invention relates to an improvement on a dry separation device. The improved steel belt type multi-stage dry separation device, through the cooperation of a first conveying assembly, a second conveying assembly and a third conveying assembly, forms a multi-stage magnetic system frame, which can perform multi-stage thorough separation of ore, has a good separation effect, and greatly improves resource utilization. The present invention is particularly suitable for enriching poor magnetite and rich magnetite, recovering previously lost magnetic minerals from abandoned tailings by dry separation, and recovering magnetic minerals from wastes such as steel slag by dry separation, and the dry separation particle size is below 30 mm.

[0021] Specifically, see Figure 1 As shown, Figure 1 The arrow shown in is the ore conveying direction. This embodiment discloses a steel belt type multi-stage dry separation device, comprising a box body 1, a feed port 2 and a discharge port 3 arranged on the box body 1, and a conveying assembly arranged in the box body 1, wherein the conveying assembly comprises a first conveying assembly 4, a second conveying assembly 5 and a third conveying assembly 6 arranged in sequence from top to bottom, the conveying directions of the first conveying assembly 4 and the third conveying assembly 6 are the same and opposite to the conveying direction of the second conveying assembly 5, and a magnetic system 7 is arranged in the first conveying assembly 4 and the third conveying assembly 6, and the discharge port 3 comprises a first discharge port 31 for outputting magnetic minerals, a second discharge port 32 and a third discharge port 33 for outputting non-magnetic minerals arranged in sequence along the conveying direction of the first conveying assembly 4, two ends of the first conveying assembly 4 are respectively located above the first discharge port 31 and the third discharge port 33, two ends of the second conveying assembly 5 are respectively located above the second discharge port 32 and the third discharge port 33, and two ends of the third conveying assembly 6 are respectively located above the first discharge port 31 and the second discharge port 32.

[0022] In this embodiment, the feed port 2 is located above the first conveying assembly 4. The first conveying assembly 4 includes two first conveying rollers 41 that are rotatably arranged, and a first conveying belt 42 that is transmission-connected to the two first conveying rollers 41, and the first conveying belt 42 is a non-magnetic steel belt. The rotation axis of the first conveying roller 41 extends in the horizontal direction and is perpendicular to the conveying direction of the first conveying assembly 4. The magnetic system 7 in the first conveying assembly 4 includes permanent magnets respectively arranged in the first conveying roller 41 at the end of the first conveying assembly 4 in the conveying direction and in the top of the inner side of the first conveying belt 42, and an electro-permanent magnet arranged at the inner bottom of the first conveying belt 42.

[0023] Here, the permanent magnet blocks on the top of the inner side of the first conveyor belt 42 are arranged with polarity S poles and N poles, which play a role in magnetic reversal and magnetic stirring of magnetic minerals, forming an upper plane magnetic system; the permanent magnet blocks in the first conveyor roller 41 at the conveying end form a circumferential magnetic system for adsorbing magnetic minerals; the electric permanent magnets at the bottom of the inner side of the first conveyor belt 42 are composed of electric permanent magnets with adjustable magnetic field strength, and the electric permanent magnet polarity is composed of S poles and N poles alternately arranged in small pole pitches in the lower plane magnetic system, which cooperates with the self-excited oscillation of the non-magnetic steel belt to break up and destroy magnetic agglomeration and magnetic wrapping phenomena and adsorb magnetic minerals. The adjustable field strength electric permanent magnet can adapt to a variety of ores. The stainless steel belt here has a self-excited vibration phenomenon during operation, which has a breaking effect on the minerals on the belt, making the sorting more thorough.

[0024] During mineral processing, the ore is put into the feed port 2, and the ore falls onto the upper first conveyor belt 42 and is transported forward. Under the action of the upper plane magnetic system, rapid magnetic reversal and magnetic stirring occur to achieve preliminary separation of magnetic minerals and non-magnetic minerals. Then the ore reaches the circumferential magnetic system. The non-magnetic minerals mixed between the magnetic minerals are not attracted by the magnetic force or the magnetic force is very small. Under the combined action of centrifugal force, gravity and magnetic reversal and magnetic stirring of the magnetic minerals, they will gradually move to the outer layer and be thrown into the third discharge port 33. The magnetic minerals are adsorbed on the lower first conveyor belt 42 and transported in the reverse direction. Under the self-excited oscillation of the lower plane magnetic system and the steel belt, the magnetic agglomeration and magnetic wrapping phenomenon are further broken up and destroyed, thereby improving the grade of the sorted ore.

[0025] In this embodiment, the second conveying assembly 5 includes two rotatable second conveying rollers 51 and a second conveying belt 52 drivingly connected to the two second conveying rollers 51. The rotation direction of the second conveying rollers 51 is opposite to that of the first conveying rollers 41.

[0026] When the magnetic minerals oscillate in the lower plane magnetic system, a small amount of mixed non-magnetic minerals fall onto the second conveyor belt 52 and are transported forward, then reach the second discharge port 32 and fall, while the magnetic minerals are conveyed to the first conveyor roller 41 at the head end along the first conveyor belt 42 and fall downward into the first discharge port 31 under the action of gravity.

[0027] In this embodiment, the third conveying assembly 6 is a rotatable third conveying roller 61, and the magnetic system 7 in the third conveying assembly 6 is a permanent magnet disposed in the third conveying roller 61. The rotation direction of the third conveying roller 61 is the same as that of the first conveying roller 41.

[0028] When the magnetic minerals on the second conveyor belt 52 fall, in order to prevent a small amount of weak magnetic minerals from being thrown out and wasted, the present invention arranges a third conveyor roller 61, and the minerals falling from the second conveyor belt 52 fall onto the third conveyor roller 61, and the non-magnetic minerals are thrown out and fall into the second discharge port 32 under the action of centrifugal force and gravity, and the weak magnetic minerals are adsorbed on the third conveyor roller 61 and are thrown out as the third conveyor roller 61 rotates to above the first discharge port 31.

[0029] Through the cooperation of the first conveyor assembly 4, the second conveyor assembly 5 and the third conveyor assembly 6, the ore can be effectively and thoroughly sorted, and the sorting is extremely thorough, which can greatly improve the grade of the sorted ore. For ore with MFE below 20%, the grade can be increased to 50% at most; for ore with MFE above 20%, the grade can be increased to 55% at most.

[0030] In this embodiment, the rotation axes of the second conveying roller 51 and the third conveying roller 61 are respectively arranged parallel to the rotation axis of the first conveying roller 41, and the first conveying roller 41, the second conveying roller 51 and the third conveying roller 61 are all driven by a motor.

[0031] The dry separation device further comprises two baffle plates 8 disposed in the box body 1 and respectively located on the side away from each other of the first discharge port 31 and the third discharge port 33, and the two baffle plates 8 are arranged to be inclined downward in a direction approaching each other. The arrangement of the baffle plates 8 can prevent the thrown ore from accumulating in a dead corner of the box body 1.

[0032] The working process of this embodiment is described in detail below: during mineral processing, the ore is put into the feed port 2, and the ore falls onto the upper first conveyor belt 42 and is transported forward, and rapid magnetic reversal and magnetic stirring occur under the action of the upper plane magnetic system, so as to achieve the preliminary separation of magnetic minerals and non-magnetic minerals. Then the ore reaches the circumferential magnetic system, and the non-magnetic minerals mixed between the magnetic minerals are not attracted by the magnetic force or the magnetic force is very small. Under the combined action of centrifugal force, gravity and magnetic reversal and magnetic stirring of the magnetic minerals, they will gradually move to the outer layer and be thrown into the third discharge port 33, while the magnetic minerals are adsorbed on the lower first conveyor belt 42 and transported in the reverse direction, and the magnetic agglomeration and magnetic wrapping phenomenon are further broken up and destroyed under the self-excited oscillation of the lower plane magnetic system and the steel belt, so as to improve the grade of the sorted ore;

[0033] When the magnetic minerals oscillate in the lower plane magnetic system, a small amount of mixed non-magnetic minerals fall onto the second conveyor belt 52 and are transported forward, then reach the second discharge port 32 and fall, while the magnetic minerals are transported to the first conveyor roller 41 at the head end along the first conveyor belt 42 and fall downward into the first discharge port 31 under the action of gravity;

[0034] When the magnetic minerals on the second conveyor belt 52 fall, in order to prevent a small amount of weak magnetic minerals from being thrown out and wasted, the present invention arranges a third conveyor roller 61, and the minerals falling from the second conveyor belt 52 fall onto the third conveyor roller 61, and the non-magnetic minerals are thrown out and fall into the second discharge port 32 under the action of centrifugal force and gravity, and the weak magnetic minerals are adsorbed on the third conveyor roller 61 and are thrown out as the third conveyor roller 61 rotates to above the first discharge port 31.

[0035] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel belt type multi-stage dry separation device, comprising: Box; A feed inlet and a discharge outlet provided on the box body; A conveying assembly arranged in the box body, the conveying assembly includes a first conveying assembly, a second conveying assembly and a third conveying assembly arranged in sequence from top to bottom, the conveying directions of the first conveying assembly and the third conveying assembly are the same and opposite to the conveying direction of the second conveying assembly, a magnetic system is arranged in both the first conveying assembly and the third conveying assembly, the first conveying assembly includes two first conveying rollers rotatably arranged, and a first conveyor belt drivingly connected to the two first conveying rollers, the discharge port includes a first discharge port for discharging magnetic minerals, a second discharge port and a third discharge port for discharging non-magnetic minerals arranged in sequence along the conveying direction of the first conveying assembly, and two ends of the first conveying assembly are respectively located above the first discharge port and the third discharge port; Features: The two ends of the second conveying component are respectively located above the second discharge port and the third discharge port, the third conveying component is a rotatably arranged third conveying roller, the magnetic system in the third conveying component is a permanent magnet arranged in the third conveying roller, and the two ends of the third conveying component are respectively located above the first discharge port and the second discharge port; The first conveyor belt is a non-magnetic steel belt. The magnetic system in the first conveying component includes permanent magnets respectively arranged in the first conveying roller at the end of the first conveying component in the conveying direction and in the top of the inner side of the first conveyor belt, and an electric permanent magnet arranged at the bottom of the inner side of the first conveyor belt. The permanent magnet blocks at the top of the inner side of the first conveyor belt are arranged with polarity of S pole and N pole with interval width, which plays a role in magnetic reversal and magnetic stirring of magnetic minerals. The permanent magnet blocks in the first conveying roller at the conveying end constitute a circumferential magnetic system for adsorbing magnetic minerals; the electric permanent magnet at the bottom of the inner side of the first conveyor belt is composed of electric permanent magnets with adjustable magnetic field strength. The polarity of the electric permanent magnet is composed of S pole and N pole, which are closely arranged with small pole pitches alternating front and back and left and right. In conjunction with the self-excited oscillation of the non-magnetic steel belt, it is used to break up and destroy magnetic agglomeration and magnetic wrapping phenomena and adsorb magnetic minerals.

2. The steel belt type multi-stage dry separation device according to claim 1 is characterized in that: The rotation axis of the first conveying roller extends along a horizontal direction and is perpendicular to a conveying direction of the first conveying assembly.

3. The steel belt type multi-stage dry separation device according to claim 2 is characterized in that: The second conveying assembly includes two rotatably arranged second conveying rollers and a second conveying belt drivingly connected to the two second conveying rollers.

4. The steel belt type multi-stage dry separation device according to claim 3 is characterized in that: The second conveying roller rotates in a direction opposite to that of the first conveying roller.

5. The steel belt type multi-stage dry separation device according to claim 1, characterized in that: The third conveying roller has a rotation direction that is the same as the rotation direction of the first conveying roller.

6. The steel belt type multi-stage dry separation device according to claim 3 is characterized in that: The rotation axes of the second conveying roller and the third conveying roller are respectively arranged parallel to the rotation axis of the first conveying roller.

7. The steel belt type multi-stage dry separation device according to claim 1, characterized in that: The dry selection device also includes two baffle plates arranged in the box body and respectively located on the side of the first discharge port and the third discharge port that are away from each other, and the two baffle plates are arranged to be inclined downward in a direction approaching each other.

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